Script started on Mon Oct  8 15:30:29 2012

[burt@mcclellan javareadlines]$ make

javac ReadLinesNumber.java
[burt@mcclellan javareadlines]$ make run

cat ReadLinesNumber.java | java ReadLinesNumber > ReadLinesNumber.out
[burt@mcclellan javareadlines]$ cat ReadLinesNumber.out

1 class ReadLinesNumber {
2 
3     // magic words to get a buffered reader from system.in
4     static java.io.BufferedReader br = new java.io.BufferedReader(
5             new java.io.InputStreamReader( System.in ) ) ;
6 
7     public static void main( String [] args ) {
8 	int ln = 1 ;
9         String s = "" ;
10 	ReadLinesNumber rln = new ReadLinesNumber() ;
11 
12 	try { 
13 	   s = br.readLine() ;
14 	   while (s!=null) {
15 	      s = (ln++) + " " + s ;
16 	      System.out.println(s) ; 
17               s = br.readLine() ;
18            }
19         } catch ( Exception e ) {
20            System.out.println("exception thrown") ;
21         }
22     }
23 
24 }
25 
[burt@mcclellan javareadlines]$ ^Dexit

Script done on Mon Oct  8 15:30:43 2012